Venu 3 no longer connecting to my Garmin speed/cadence sensor

My Watch used to sense my Garmin Edge 500 speed/cadence. This is no longer happening.

I removed the device in the sensor list hoping it would connect again. No such luck.

I replaced the battery in the Garmin 500 speed cadence sensor - No luck

It connected 6 days ago no problem and now no joy with it

Has anyone else had this issue?